Improved ash-sifter



inited gister DANIEL T. ROBINSON. OF BOSTON, MASSACHUSETTS.

Letters Patent No. 94,651, dated September 1869.

IMPRovnD ASH-sieren How-.

The Schedule referred to in these Letters Patent and making part of thelame.

To all to whom. these presents shall ooms:

Be it known that I, DANIEL T. ROBINSON, of Boston, in the county ofSuifolk, and Commonwealth of Massachusetts, have made an invention of anew and useful Asl'I-Sifteryand do hereby declare the following to be afull, clear, and exa'ct description thereof, duc reference being had tothe accompanying drawings, making part of this specification, and inwhich Figure 1 is a perspective representation, and

Figure 2, a vertical section of my invention.

This invention is intended to secure cleanliness, economy, andconvenience in sitting coal-ashes, which, united with ease and rapidityin action, render such invention of equal if not superior value to thosenow manufactured and introduced.

The drawings which accompany and make part of this specification exhibitan implement in which my invention is embodied, and which consists asfollows:

A circular disk, or cover, a, is first provided of such size as to litupon the top of a barrel or other receptacle, and tightly close it, suchdisk or cover having a large central and rectangular opening, b, forprecipitation of sifted ashes to the interior of the barrel, and with asecond smaller and auxiliary opening or trap, c, disposed alongside ofthe central opening.

About the opening b, a hopper or raised enclosing ledge, d, is disposed,while upon the upper part of this hopper a sliding screen-box or sieve,e, rests, the bottom of this box being formed of a screen, f, oflsuitable material.

The bottom ofthe box e rests and slides upon the ends of the hopper d,which are slightly depressed below the level of the sides thereof, thelatter thus becoming guides to the reciprocating movements of the sieve,and preventing its displacement.

The box e is furnished with a cover, g, at top, for permitting entranceof ashes, and is also provided at one end with a drop-leaf or door, h,to permit the screened coal to be dumped from the box, as hereinafterexplained.

The necessary reciprocating movements of the sieve are eiiected asfollows:

A hoiizontal shaft, fi, is disposed centrally across the interior of'the hopper d, and revolves in bearingsmade in its sides.

'lo opposite sides of each extremity of .the shaft i, and in closeproximity to the inner side walls of the l hopper, I afix twowiping-studs or cams jj, while to each of such walls I afiix abent-lever, It, each lever k being pivoted at its bend to the wall, asshown at l, and disposed with respect to the wiping-studs jj in suchmanner that the latter, revolving with the shaft,

sha1l,impinge against the under surface of the hoiizontal arm of eachlever, the upright arm thereof being disposed in front of a projection,1u or m, affixed to or making part of the/sides ofthe hopper, asrepresented in the drawings. v

Furthermore, additional spurs,A or projections, n 11., are formed uponoraliixed to the walls of the hopper upon sides of the shaft opposite tothose first mentioned, these latter spurs being situated in the path ofmovement of the wipers jj.

It will be seen that-upon putting the shaft'i in revolution, that thewipers jj will alternately impinge against the nearest arm of each lever7:', and against each spur n n. j y

The impact of the wipers beneath the levers or the spurs has the effectof producing one traverse of the sieve upon the hopper, and ofthrowinginto the path of movement of either the levers or the wipers,the projections m m or n 11.. 4

By the arrangement of the shaft i, wipers jj, levels k L, andprojections Im m and n n, I effectA four movements of the sieve to onerotation of the shaft, thus permitting rapid reciprocations' of thesieve to be atta-ined, with a comparatively easy and slow rotation oftheshaft.

In using the above described implement, the ashes` tobescreened are tobe dumped into the sieve, and its cover tightly closed,fwhich preventsescape of dust into the apzu'tment.

The shaft is then to `be rotated for a short time, and after the dustwithin the sievehas subsided, the cover is to be raised, and theclinkers sorted from the coal and thrown iut-o the barrel through thetrap c.

The sieve is then to be tilted upon one. end, and into the inclinedposition shown in in2 ofthe accompanying drawings, and the drop-door hopened, which allows the coal to fall into a hod placed to receive it.

An ash-sitter, made as described, has been found in practice to embodyall desirable features of such arti cles, and' may be produced at smallcost.

` Y Claim. c

I claim an ash-sifter, composed of the disk a, with its apertures b andc, hopper d, in combination with the sieve c, the shaft t', and itswipers j j, the levers k k, and projections m m and mi, or theirequivalents,

the whole heilig and operating as described.

DANIEL T. ROBINSON.

Witnesses:

FRED. CURTIS, EDWARD GRIFFITH.

